EC Number |
General Information |
Reference |
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1.10.3.3 | physiological function |
AAO plays a major role in the initial phase (oxidation of L-ascorbic acid to dehydroascorbic acid) of vitamin C degradation in broccoli |
712620 |
1.10.3.3 | evolution |
AOase occurs only in higher plants |
717986 |
1.10.3.3 | more |
proposed catalytic model, structure-function relationship, overview. Intramolecular electron transfer from the type-l copper centre to the trinuclear copper centre |
717986 |
1.10.3.3 | physiological function |
ascorbate oxidase is a blue multicopper oxidase that catalyses the four-electron reduction of dioxygen to water with concomitant one-electron oxidation of the reducing organic substrate |
717986 |
1.10.3.3 | evolution |
AAO belongs to the large family of multicopper oxidases. AAO labelling in the cytosol, walls and chloroplasts of Chaetomorpha linum cells, whereas in angiosperms this enzyme is almost exclusively confined to the extracellular matrix, possible function of AAO in adaptation and functional evolution of its cellular location, overview |
724853 |
1.10.3.3 | more |
partially folded monomeric species might populate the energy landscape of the enzyme. The overall AAO stability is crucially controlled by a few quaternary interactions at the subunits' interface |
724962 |
1.10.3.3 | metabolism |
stability of total vitamin C in situ was strongly dependent on the plant maturity stage and the processing conditions applied |
725176 |
1.10.3.3 | physiological function |
ascorbate/dehydroascorbate play important roles in plant growth |
725176 |
1.10.3.3 | malfunction |
a diminution in ascorbate oxidase activity affects carbon allocation and improves yield in tomato under water deficit, overview. RNAi knockout plants show increased fruit yield under three conditions where assimilate became limiting for wild-type plants: when fruit trusses are left unpruned, when leaves are removed or when water supply is limited. Several alterations in the transgenic lines can contribute to the improved yield and favour transport of assimilate from leaves to fruits in the ascorbate oxidase lines. RNAi lines show altered sink strength |
-, 726138 |
1.10.3.3 | physiological function |
ascorbate oxidase is an apoplastic enzyme, which controls the redox state of the apoplastic ascorbate pool, effects of ascorbate oxidase on the apoplastic redox state, overview |
-, 726138 |